Related Clues:

• Steel - bottle - neck
• Brass - steel
• Courage - cheek
• Sensor for pain etc
• Cool courage
• Audacity (informal)
• Derring-do
• Bottle-opener very well hidden?
• Knight's attribute
• Impulse transmitter — bottle
• Medal-worthy quality
• Brass neck
• "The __!"
• Novocaine target
• It may be in a bundle